from flask import abort, jsonify
from flask import current_app
from flask import g
from flask import request
from flask import session

from info import constants, db
from info.models import News, User, Comment, CommentLike
from info.modules.news import news_blu
from flask import render_template

from info.utils.common import user_login_data
from info.utils.response_code import RET


@news_blu.route("/news_collect",methods=["POST"])
@user_login_data
def news_collected():
    user=g.user
    if not user:
        return jsonify(errno=RET.NODATA,errmsg="用户未登录")
    # 收藏新闻：
    # 接受参数，json
    # 判断参数
    # 查询新闻，病判断新闻是否存在：

    #接受新闻：
    news_id=request.json.get("news_id")
    action=request.json.get("action")
    if not ([news_id,action]):
        return jsonify(errno=RET.DATAERR,errmsg="数据错误")

    if action not in ("collect", "cancel_collect"):
        return jsonify(errno=RET.DATAERR, errmsg="数据错误")
    try:
        news_id=int(news_id)
    except Exception as e :
        current_app.logger.error(e)
        return  jsonify(errno=RET.DATAERR,errmsg="数据错误")

    # 根据新闻id判断新闻是否存在
    try:
        news=News.query.get(news_id)
    except Exception as e:
        return jsonify(errno=RET.NODATA,errmsg="数据不存在")
    # 收藏的实现:
    if action=="collect":
        if news not in user.collection_news:
            user.collection_news.append(news)
            # db.session.commit
        return jsonify(errno=RET.OK,errmsg="收藏成功")
    else:
        if news in user.collection_news:
            user.collection_news.remove(news)

        return jsonify(errno=RET.OK, errmsg="取消收藏")


@news_blu.route("/<int:news_id>")
@user_login_data
def new_detail(news_id):
    user=g.user
    news_list = []
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
        # news_list是满足条件的6条数据模型，不是简单的列表（
    except Exception as e:
        current_app.logger.error(e)

    news_dict_li = []
    for news in news_list:
        news_dict_li.append(news.to_basic_dict())

    news=None
    try:
        news=News.query.get(news_id)
    except Exception as e :
        current_app.logger.error(e)

    if not news:
        abort(404)
    # 更新新闻的点击次数
    news.clicks+=1

    is_collected=False
    if user:
        if news in user.collection_news:
            is_collected=True

            # 查询评论数据
    comments=[]
    try:
        comments=Comment.query.filter(Comment.news_id==news_id).order_by(Comment.create_time.desc()).all()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR,errmsg="数据查询错误")

    comment_like_ids=[]
    if g.user:
        try:
    # 查询出当前新闻的所有评论 的id
            comment_ids=[comment.id for comment in comments]
            # 查询评论中那些评论被用户点赞
            comment_likes=CommentLike.query.filter(CommentLike.comment_id.in_(comment_ids),CommentLike.user_id==g.user.id).all()
            comment_like_ids=[comment_like.comment_id for comment_like in comment_likes]
        except Exception as e:
            current_app.logger.error(e)

    comment_dict_li=[]
    for comment in comments:
        comment_dict=comment.to_dict()
        comment_dict["is_like"]=False
        if comment.id in comment_like_ids:
            comment_dict["is_like"]=True
        comment_dict_li.append(comment_dict)

    data={
        "news_dict_li":news_dict_li,
        "user":user.to_dict() if user else None,
        "news":news.to_dict(),
        "is_collected":is_collected,
        "comments":comment_dict_li,
    }

    return render_template("news/detail.html",data=data)

@news_blu.route("/news_comment",methods=['post'])
@user_login_data
def news_comment():
    user=g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR,errmsg="用户未登陆")
    new_id=request.json.get("news_id")
    comment_content = request.json.get("comment")
    parent_id = request.json.get("parent_id")

    if not all([new_id,comment_content]):
        return jsonify(errno=RET.DATAERR,errmsg="参数错误")

    try:
        new_id=int(new_id)
        if parent_id:
            parent_id=int(parent_id)
    except Exception as e:
        current_app.logger.error(e)
        return  jsonify(errno=RET.DATAERR,errmsg="参数错误")
    try:
        news=News.query.get(new_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DATAERR,errmsg="没有查询到新闻")
    if not news:
        return jsonify(errno=RET.DATAERR,errmsg="新闻没有内容")

    comment=Comment()
    comment.user_id=user.id
    comment.news_id=new_id
    comment.content=comment_content
    if parent_id:
        comment.parent_id=parent_id
    try:
        db.session.add(comment)
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()

        # rollback()要记得添加括号
        # 自己commit是因为要讲commment数据返回到前段，自动提交是在return之后

    return jsonify(errno=RET.OK,errmsg="评论保存成功",data=comment.to_dict())

@news_blu.route("/comment_like",methods=['post'])
@user_login_data
def comment_like():
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登陆")
    new_id = request.json.get("news_id")
    comment_id = request.json.get("comment_id")
    action = request.json.get("action")

    if not all([new_id, comment_id,action]):
        return jsonify(errno=RET.DATAERR, errmsg="参数错误")

    if action not in ["add","remove"]:
        return jsonify(errno=RET.DATAERR, errmsg="参数错误")

    try:
        new_id = int(new_id)
        comment_id = int(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DATAERR, errmsg="参数错误")

    try:
        comments = Comment.query.get(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DATAERR, errmsg="没有查询到评论")
    if not comments:
        return jsonify(errno=RET.DATAERR, errmsg="评论不存在")

    #点赞评论
    if action=="add":
        comment_like_model=CommentLike()  #初始化commentlike列表
        comment_like_model.comment_id=comments.id
        comment_like_model.user_id=user.id
        db.session.add(comment_like_model)
        comments.like_count += 1

    else:
        comment_like_model=CommentLike.query.filter(CommentLike.user_id==user.id,CommentLike.comment_id==comments.id).first()
        if comment_like_model:
            db.session.delete(comment_like_model)
            comments.like_count-=1



    try:
        db.session.commit()
    except Exception as e:
        db.session.rollback()
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR,errmsg="数据库操作错误")

    return jsonify(errno=RET.OK,errmsg="OK")